Pencil-sharpener.



H. L. ADAMS.

4 PENCIL SHARPENER. APPLIUATION FILED JUNE is, 1910. RENEWED MAY 1 1913.

1 $83,649. Patented Jan. 6, 1914.

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ATENT OFFIfiE.

IPENCIL-SHARPENER.

Specification of Letters Patent.

Application filed June 13, 1910, Serial No. 566,617. Renewed May 16,1913. Serial No. 768,155.

To all whom it may concern:

Be it known that I, HARRY L. ADAMS, a citizen of the United States,residing in Philadelphia, Pennsylvania, have invented certainImprovements in Pencil-Sharpeners, of which the following is aspecification.

My invention relates to means for sharpening or pointing the leads ofpencils; and the object of my invention is to provide a simple andefiicient device for accomplishing this work, which device may form anindependent structure to be carried in the pocket or may be carried atthe end of an ordinary pencil prepared for the purpose of receiving thesame, or at the end of a holder supporting a pencil or a section orsections of pencil lead. These and other features of my invention arepointed out hereinafter, reference being had to the accompanyingdrawings, in which:

Figure 1, is a perspective view of my improved pencil sharpener orpointer in the position of use; Fig. 2, is a sectional view illustratingthe carrier for the pencil pointer with the latter in position; Fig. 3,is a perspective view of the pencil pointer and its carrier detached;Fig. 4, is a plan view of the pencil pointer; Fig. 5, is a perspectiveview of blanks from which the pencil pointers may be made; Fig. 6, is aview illustrating a step in the manufacture of pencil pointers embodyingmy invention, and Figs. 7, 8, 9 and 10, are views of other forms ofsharpening or pointing members embodying my invention.

The essential feature of my invention comprises a bit or stock having aplurality of cutting or shaving edges to engage the pencil lead. Thisbit or stock comprises a shank 1, having a groove or grooves 2, and whentwo grooves are employed they are preferably disposed upon oppositesides of the shank and substantially opposite each other, but preferablyslightly offset with respect to each other in a manner and for a purposehereinafter described. The end of the bit may be milled or otherwisenotched to form a long beveled slit in a direction substantially atright angles to the plane of the groove or grooves formed in said bit,and such construction provides a plurality of cutting edges; the workingend of the bit showing substantially V-shaped spaces wide at the outerend and tapering substantially to a point at the root of the notch ornotches. In the preferred form of structure embodying my invention asshown in Figs. 1, 2, 3, et seq, the bit is provided with four cuttingedges; two of which are indicated at 8, and two at 4. An importantfeature in the arrangement of these cutting elements is the fact thattheir active edges are not disposed in an annular or circular path, andhence in practice not more than two of the cutting edges come intoactive contact with the lead to sharpen the same at any one time; thenon-acting edges acting as guides, and when one set is cutting the otheris guiding and vice versa. By this means there is no danger of thepencil lead jamming and breaking while being pointed or sharpened, ormaking fiat places on the pencil point. This feature is clearly broughtout in Figs. 4 and 5, and an examination of these views will reveal thateach groove in the blank is so disposed as to leave a relatively wideedge 5 on one side and a relatively narrow edge 6 on the other; suchdisposition being on each side of the blank in such relation that thewide edges are opposite the narrow edges. By this means, the differentlyspaced cutting elements may be formed. as clearly indicated in Fig. 4,by the use of a suitable tool, such as a milling cutter 7 as indicatedin Fig. 6, so arranged as to out through the end of the blank in a linesubstantially at right angles to the plane of the grooves; the roots ofsaid grooves not being directly opposite each other.

In the structure shown in Fig. 7 the cutting elements have been spreadslightly by a suitable tool inserted between the same. This spreadingeffect may be in both directions or at right angles to the out. In thestructure shown in Fig. 8, the blanks from which the cutting devices aremade have only one groove. A cut is made across the end of the bit atright angles to this groove, such cut forming a pair of cutting elements3 and 4*, and a guide member 8. The cutting elements B and 4 may bespread slightly to insure a space of proper size and Patented J an. 6,1914.

contour to effect the desired pointing or sharpening of the pencil.

In the structure shown in Figs. 1, 2, 3, et seq., the groove or grooves2 are substantially V-shaped.

In Fig. 9, I have shown a cutting device in which the grooves arerounded as indicated at 2"; such grooves being offset with respect toeach other on opposite sides of the shank or bit.

In practice, it is desirable that the groove or grooves of the shank orbit extend the full length of the same since such arrangement permitsthe preparation of the shanks or bits in stock lengths, and in someinstances with the grooves rolled therein, or cut as may be desired.However, as the grooved condition is only needed at the active cuttingend of the bit, I may provide a bit of the character shown in Fig. 10.

When the bit has been notched by a milling tool or other device itmay bedesirable to finish the active edges of the cutting elements by means ofa small oil stone or the corner of the same working in the grooves ofthe bit.

I preferably organize my structure by providing a suitable holder 9having a removable end or cap 9, and place the sharpening or pointingelement in such cap. To hold it in place, I provide a suitable chuck 10which may be made of metal tubing shaped to conform to the contour ofthe bit and held in place by suitable means, such as a pin 11. Ifdesired, the cap 9 may have a knurled edge 12 to facilitate turning andmay be provided with a rubber tip 13 for erasing purposes.

Other forms of cutting or pointing devices may be made within the scopeof my invention; the essential point being the provision of a groovedand notched bit forming a pluralityof cutting edges so arranged thatwhile some are cutting the others act as guides and vice versa.

I claim:

1'. A pencil pointer comprising a member having a plurality of angularprojections with cutting edges, said edges being in pairs ofi'set withrespect to each other, and each pair of said projections having beveledfaces paralleling each other and each projection also having a faceintersecting a beveled face to form a cutting edge.

2. A pencil pointer comprising a grooved member having a plurality ofprojections with cutting edges, formed by notching said grooved membersubstantially at a right angle to the plane of the grooves, said edgesbeing ofi'set with respect to each other.

3. A pencil pointer comprising a member having paralleling outer wallswith a plurality of projections with inwardly disposed cutting edgesextending diagonally with respect to the outer walls, one of said edgesbeing oifset with respect to a circular are passing through the planesof the other cutting edges.

4. A pencil pointer comprising a grooved member having paralleling outerwalls with a plurality of projections with inwardly disposed cuttingedges extending diagonally with respect to the outer walls, one of saidedges being offset with respect to a circular arc passing through theplanes of the other cutting edges.

5. A pencil pointer comprising a longitudinally grooved member notchedin the end at substantially right angles to the plane of the groovedportion to form a plurality of cutting edges.

6. A pencil pointer comprising a member having grooved walls in aplurality of planes, said member being notched at the end substantiallyat right angles to the plane of said grooves to form a plurality ofcutting edges, said notch being V-shaped and forming cutting edgesdiagonally disposed with respect to the plane of the grooves.

7. The combination with a holder, of a grooved member carried thereby,and a grooved pencil pointer adapted to be carried by said holder, thegrooves of the pencil pointer being substantially of the same characteras the grooves in the holder.

8. The combination of a pencil casing having a hollow end, a plugfitting the end of said casing, a pencil sharpener carried by said plugcomprising a bit having grooved sides with a plurality of sharpeningelements, and a grooved chuck carried by said plug in which the saidsharpening bit is removably held. 7

9. A pencil pointer comprising a metal bar or bit having two parallelbeveled or V-shaped grooves on substantially opposite sides, with acomparatively long concaved or V-shaped notch in end of said bit or barsubstantially at a right angle to said parallel beveled grooves, thestructure so made forming, without any subsequent opening or' spreading,a plurality of tapering blades having chisel shaped cutting edges.

10. A pencil pointer comprising a member having a plurality ofprojections with cutting edges, said edges being in pairs offset withrespect to each other and each projection having a plurality of facesforming a cutting edge at their intersection, one of said facesparalleling a corresponding face on the projection diagonally opposite,while the.

having a plurality of projections with anguname to this specification inthe presence of lar cutting edges, said edges bein in pairs twosubscribing Witnesses. offset With respect to each other, t e projec-HARRY L ADAMS tions carrying said edges difiering in size, 5 With theprojections diagonally opposite Witnesses:

each other of substantially the same size. MURRAY C. BoYnn,

In testimony whereof, I have signed my WM. A. BARR.

Gopies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. C.

